How to setup communication between three xbees

Hi,
I succesfully created communication between two xbees. I am using xbee series 2. The setup is like this:

Node1: xbee coordinator at. with DH and DL of node 2

Node2: xbee router At with DH and DL of node 1.

Now, i need another node in between these two, connecting these two somewhat like this,

node1 <~~~~~~> node2 <~~~~~~> node3

here, node 2 must relay communication on both the sides. How do I configure those three to create a communication link like that? I just want this: info generated on node1 should reach node3 via node2 and info generated on node3 should reach node1 via node2.

my comment is generaly about zigbee networks. coordinators and routers will try to route traffic to end devices. To do that they use some route discovery. So if you have a gap in your network you can just add a new router in the gap to relay traffic on to the distant node. The new node does have to have all the same network settings and I am not an expert on smart energy, but It is fairly simple once you have your network talking to add a repeater. Digi even makes a product just for adding repeater nodes. http://www.digi.com/products/wireless-modems-peripherals/wireless-range-extenders-peripherals/xbee-se-range-extender